At present,the acoustic blank zone detection method based on sub-bottom(SBP)is lacking,and manual detection and extraction is time-consuming and laborious and depends on manual experience.In view of this situation,two acoustic blank zone detection methods are proposed,which are suitable for shallow and deep blank zone detection respectively.Firstly,based on the characteristics of weak echo energy and truncated histogram distribution caused by shallow acoustic blank zone,an acoustic blank zone detection method based on histogram distribution characteristics is presented.Secondly,in view of the interface characteristic of the deep acoustic blank zone without obvious acoustic impedance difference,the formation structure information is obtained by using the horizon picking algorithm,and then the fluctuation function model of the lower formation structure is established,and the position of the acoustic blank zone is determined by the extreme point of the fitted function.The experimental results show that the detection accuracy and recall rate of the proposed method are better than 80%and 90%respectively,thus achieving reliable acoustic blank band detection.
关键词
声学空白带探测/浅地层剖面图像/特征提取/地层结构提取/层界提取
Key words
acoustic blank zone detection/sub-bottom profile image/feature extraction/reflector structure extraction/horizon picking
维普
万方数据